Copper Claymore

The copper claymore would be a large serated sword crafted with copper, and as the sticks,diamonds. The copper claymore would have a 50% chance to summon a lightning strike when hitting a mob, and melee, would do 9 damage. It could also be found in structures such as strongholds and mineshafts, as well as deep dark cities. But you could not put the knockback enchantment on it, just to balance the lightning thing.